If there are 15 tiles in each box, how many boxes of tile does Sarah need for her bathroom floor? (Rest of details of the question is below.)Sarah...

The floor measures 4 by 7
.

We need to find the number of (8x8) tiles to cover the
floor.

I am assuming the the tiles measure 8" ( 8
inches)

We will convert the sides of the floor to
inches.

We know that 1 foot = 12
in.

==> The width = 4 ft = 4*12 = 48
in.

==> Then we need 48/8 tiles = 6 tiles for the
width.

==> The length = 7 ft = 7*12 in = 84
in.

==> Then we need 84/8 tiles = 10.5
tiles.

Then the total number of tiles to cover the area is
6*10.5 = 63 tiles.

Each box contains 15
tiles.

==> 4 boxes contains 4*15 = 60
tiles.

==> 5 boxes contains 5*15 = 75
tiles

Then we need 5 boxes to cover the
floor.